| Grundy County Illinois Cities/Towns - Aux Sable, Braceville, Carbon Hill, Coal City, Diamond, Dwight, East Brooklyn, Gardner, Godley, Kinsman, Mazon, Minooka, Morris (County Seat), Nettle Creek, Saratoga, Seneca, South Wilmington, Verona, Wauponsee |
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Your Ad Here Grundy County is a county located in the U.S. state of Illinois. As of 2000, the population was 37,535. Its county seat is Morris. History Grundy County was established on February 17, 1841. It was named for Felix Grundy, political leader. He was appointed (1838) Attorney General by President Van Buren and resigned (1839) to return to the Senate. ![]() |